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    <div style="border:1px solid blue ;">HTML</div>
    <div>html:1</div>
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    <span style="border: 1px solid red;">html5</span>
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        <b>html:2</b>
        HTML5<br>programming
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            <i>Html:3</i>
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            <u>html:4</u>
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            <span>html:6</span>
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            <div>html:5</div>
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